Re: [cryptography] sander & ta-shma + bitcoin, b-money, hashcash (Re: Is BitCoin a triple entry system?)

2011-06-15 Thread Adam Back
Efficiency is relative. Vs a central bank and Brands credentials its inefficient - a handful of modexps vs say one hundred or a thousand. Vs bitcoin with longest hash chain wins, and minimum hash being 10 minutes work for the entire network, I think straight DLREP on all the coins in a time inte

Re: [cryptography] sander & ta-shma + bitcoin, b-money, hashcash (Re: Is BitCoin a triple entry system?)

2011-06-14 Thread Peter Gutmann
"James A. Donald" writes: >On 2011-06-15 1:29 AM, Ian G wrote: >> Which, to my mind was the same sin as the alternate: obsession with >> privacy, including to the extent of eliminating the core requirements of >> money. The first law of money is that it has to be safe: >> >> http://forum.bitcoin.o

Re: [cryptography] sander & ta-shma + bitcoin, b-money, hashcash (Re: Is BitCoin a triple entry system?)

2011-06-14 Thread James A. Donald
On 2011-06-15 1:29 AM, Ian G wrote: Which, to my mind was the same sin as the alternate: obsession with privacy, including to the extent of eliminating the core requirements of money. The first law of money is that it has to be safe: http://forum.bitcoin.org/index.php?topic=16457.0 This is the

Re: [cryptography] sander & ta-shma + bitcoin, b-money, hashcash (Re: Is BitCoin a triple entry system?)

2011-06-14 Thread Ian G
On 14/06/11 6:13 PM, Adam Back wrote: See also: Auditable Anonymous Electronic Cash by Tomas Sander and Amnon Ta-Shma in crypto 1998. http://www.math.tau.ac.il/~amnon/Papers/ST.crypto99.pdf ... In their setting Sander & Ta-Shma also can identify double-spenders because their identity is inclu

Re: [cryptography] sander & ta-shma + bitcoin, b-money, hashcash (Re: Is BitCoin a triple entry system?)

2011-06-14 Thread James A. Donald
On 2011-06-14 6:13 PM, Adam Back wrote: See also: Auditable Anonymous Electronic Cash by Tomas Sander and Amnon Ta-Shma in crypto 1998. http://www.math.tau.ac.il/~amnon/Papers/ST.crypto99.pdf Its basically the idea of using non-interactive zero knowlede proof of membership in a list of coins a

[cryptography] sander & ta-shma + bitcoin, b-money, hashcash (Re: Is BitCoin a triple entry system?)

2011-06-14 Thread Adam Back
See also: Auditable Anonymous Electronic Cash by Tomas Sander and Amnon Ta-Shma in crypto 1998. http://www.math.tau.ac.il/~amnon/Papers/ST.crypto99.pdf Its basically the idea of using non-interactive zero knowlede proof of membership in a list of coins as an alternative to blinding. The intere